They are NEVER alone and trailing rocks in it's wake usually follow a fanned out, conical, shuttlecock shape Nd they're bug enough for a decent bit of damage if they hit and small enough notvto be detected.

If there's a flash, don't run to the windows to see what it was, you might get a face full of flying glass like in chelyabinsk.

I've been saying this for years and it's 100% in the hope of sparing at least one person injury

It's not fear mongering, anymore than fire drills are. It should be common knowledge. Everyone's first thought "take cover and wait 2mins for the possible shockwave.

It only gets wilder from here on in.